About this replacement
Ezviz DP1S / DP1C / DP1 — 3.8V Li-Polymer Replacement Battery (H866281P)
This 3.8V, 6800mAh Li-Polymer cell replaces the original H866281P battery in the Ezviz DP1S, DP1C, and DP1 wireless smart doorbell cameras. All three models share the same battery bay, connector, and BMS handshake protocol. Capacity is 6800mAh (25.84Wh) — matching the original spec exactly.
- DP1S, DP1C, and DP1 compatibility: All three variants run the same 3.8V power rail, use the same physical connector, and communicate with the camera's BMS over the same signal line — one cell fits all three without modification.
- Bench tested on actual hardware: We cycled the H866281P replacement through motion-trigger sequences and sustained IR LED loads. The BMS held stable under the combined current draw of the processor wake and IR array without tripping into protection mode.
- First-install power cycle: After fitting the new cell, power cycle the camera once through the Ezviz app. The firmware must register the new battery before motion events log correctly to cloud storage — skipping this step can cause missed clips on first-day recordings.
Camera going offline in the Ezviz app after battery swap
Swapping the battery clears the camera's active session token. The Ezviz app loses its authenticated connection and marks the device offline, even when the camera has power and a strong WiFi signal. This is a firmware handshake issue, not a fault with the replacement cell. Open the Ezviz app, navigate to the device settings, and trigger a manual restart — the camera re-registers within 60 seconds and comes back online at its current voltage reading.
App reporting 0% or incorrect charge percentage after installation
The DP1S uses a voltage-threshold indicator — not a fuel gauge IC — to estimate charge level. When a new cell arrives partially discharged from storage, the voltage may sit in a range the firmware maps to 0% or an erratic figure. This corrects itself after one full charge cycle. Charge the camera to full, then let it discharge through normal motion-trigger use before trusting the percentage shown in the app.